Solid material comminution or disintegration – Processes – Miscellaneous
Reexamination Certificate
2011-04-12
2011-04-12
Rosenbaum, Mark (Department: 3725)
Solid material comminution or disintegration
Processes
Miscellaneous
C241S209000, C241S213000
Reexamination Certificate
active
07922109
ABSTRACT:
A gyratory crusher includes a crushing head on which a first crushing shell is mounted, and a frame on which a second crushing shell is mounted. The crusher has a thrust bearing which is made up of horizontal bearing plates and which is located between a vertical shaft and a piston arranged vertically below the vertical shaft. The crusher further has a first space, which is adapted to receive a variable amount of pressurized liquid, the first space being defined by the piston and a piston housing formed in the frame, and a second space which is adapted to receive, by way of a duct, pressurized liquid from the first space, the second space being located between the vertical shaft and the piston and at least partly accommodated in an opening in at least one of the bearing plates. The first space and the second space are adapted, by the liquid, to transmit forces from the crushing head to the piston housing, in order that the load on the thrust bearing is relieved.
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International Search Report mailed Mar. 17, 2010 issued in PCT Application No. PCT/SE2009/051414.
Persson Sebastian
Sjöberg Patrik
Drinker Biddle & Reath LLP
Rosenbaum Mark
Sandvik Intellectual Property AB
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